Double-acting pump



J. McGWIN.

DOUBLE ACTING PUMP.

(No Model.)

Patented June 3, 1884.

INVENTOR f g e B ATTORNEYS.

N. FEIERS. PiwluLilhngnlpher. Washmglon. D. C.

UNITED STATES PATENT OFFICE.

JAMES MoGWIN, or FULTON, MISSOURI.

DOUBLE-ACTING PUMP.

SPECIFICATION forming part of Letters Patent NO. 299,666, dated June 3, 1884:. l

Application filed September 11, 1883. (No model.)

To aZZwhom it may concern.-

Be it known that I, JAMES MoGwIN, of Fulton, Oallaway county, Missouri, have invented a new and Improved Double-Acting Pump, of which the following is a full, clear, and exact description.

The object of my invention is to provide a new and improved double-acting pump for Artesian and other wells.

This invention consists in a double-acting pump constructed with an inner and an outer cylinder, the inner one containing a piston secured to a piston-rod packed in the top of the cylinder. To the bottom of the cylinder three tubes, each containing a valve, are secured, one of the tubes being in communication with the inner cylinder, the other with outer cylinder, and the third in communication with a vertical channel between the two cylinders. A duct connects the innercylinder with the tube in communication with the vertical channel between the two cylinders.

Reference is to be had to the accompanying drawings, forming a part of this specification, in which similar letters of reference indicate corresponding parts in all the figures.

Figure 1 is a longitudinal sectional elevation of my improved double-acting pump. Fig. 2 is a sectional plan View of the same on theline w m, Fig. 1. Fig. 3 is a sectional plan view of the same on the line y 3 Fig. 1; and Fig. 4 is a longitudinal sectional view of the bottom part on the line 2 2, Fig. 3.

The piston A, working in a cylinder, B, is secured to a piston-rod, C, which is provided with a series of packing collars, D, fitting closely in a tube, E, formed on the top F of the cylinder, which tube is flared outward slightly at the top and bottom. The top F is provided with a series of apertures, a, arranged in a circle. An annular valve-plate, G, rests on the top F, and is provided with a central collar, G, surrounded by a spring, H, the upper end of which rests against a crosspiece, J, held in the upper part of a cap, K, which is contracted toward its upper end and provided with a neck, K, to which the lower end of the stand-pipe is secured. The cylinder B is surrounded by a larger cylinder, L, on the upper end of which outer cylinder, L, the cap K is screwed. The opening 9 establishes a communication between the upper I part of the cylinder B and the channel M be tween said cylinder and cylinder L. Two vertical radial partitions, M, form the channels M M at the upper end of the foriger of which an opening, h, is formed. Three tubes, N N N are secured to the bottoms of cylinders B and L, each containing a ball-valve, 0, resting on a seat, Z. These seats are tubular and of smaller diameter than the tubes, in order that they may fit within the same, and said seats are formed on a base, Z. One of said seats is provided with an opening, 1 registering with the lower end of duct 1?, as shown. The upper end of the tube N communicates with the bottom of the channel M. The tube N communicates with the channel ll/P. The tube N communicates with the bottom of the cylinder B. A duct, I, extends from the bot-* tom of the cylinder B to the bottom of the tube N. A cap, Q, open at the bottom, is screwed on the lower end of the cylinder L and surrounds the tubes N N N. If desired, the pump can be inserted in the tube of an Artesian well, and in that case no stand-pipe need be secured to the top of the cap K.

The operation is as follows: When the piston A ascends, water is drawn into the bottom of the cylinder B through the tube N the corresponding valve, O, being raised. The water above the piston is forced out through the apertures a. into the cap K, the valve G being raised by the pressure. When the piston A descends, the water is drawn into the upper part of the cylinder B through the tube N channel M and the opening The water below the piston is forced out through the duct I, the tube N, the channel M, and into the cap K. The water rises from the cap K into the stand-pipe secured to the neck K, the rod 0 working up and down in the stand-pipe.

Having thus described my invention, I claim as new and desire to secure by Letters Patent 1. The two cylinders B L, partitions M M, forming channels M M connecting with the piston-cylinder and the chamber above said cylinder, respectively, tubes N N N, provided with valves and communicating with the said channels and piston-cylinder, as shown, and duct 1 in combination with the top F, having apertures a, the spring-pressed annular valve G, and the piston A 0, all arranged substantially as shown, and for the purpose set forth.

IOO

2. The combination of the piston-cylinder}; er diameter than said tubes, one of the seats and piston A O with the apertured cap F, tube being provided with an opening, 1 reglster- E, annular valve G, spring H, and crossbar ing with the duct, as shown and described.

J substantially as set forth. J AMES MCGHVIN, 5 3. The e0mbinati0n,in a double-acting pump, \Vitnesses:

0f the tubes N N N and duct 1? with the tu- S, T. HARRISON,

bular seats I, formed on a base, Z, and of small- G. T. SLEDGE. 

